I don't know who De Vaca is but by context clues I would infer that he realized that Native Americans where not the savages they where thought to be.
That statement is True
A labor force is considered to experience an increase if the amount of employment people grow in larger number compared to the amount of unemployed people.
In this case,
12.1 million - 7.3 million = 4.8 increase in labor force.
<span>Regional commerce policies are shaped as synecdoche by national interest. Each region is not necessarily a representative piece of the whole. Whereas regional interest may be varied, changing from region to region, broader scope national interest is more homogeneous, taking into account a majority of the larger group and eliminating outliers. Thus national interest shapes policies in a way that keeps regions accountable to a set of rules that keeps them relatively homogeneous across different regions.</span>
1) Avoiding two wars - the war of independence and the war with Canada which was essentially also a war with Britain, possibly also the civil war.
<span>2) Britain abolished slavery before America. </span>
<span>3) Independence was unnecessary, Britain gave up her colonies eventually anyway. </span>